US3924724A - Structure for facilitating interchange of typing elements - Google Patents

Structure for facilitating interchange of typing elements Download PDF

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Publication number
US3924724A
US3924724A US560085A US56008575A US3924724A US 3924724 A US3924724 A US 3924724A US 560085 A US560085 A US 560085A US 56008575 A US56008575 A US 56008575A US 3924724 A US3924724 A US 3924724A
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US
United States
Prior art keywords
cover
cap
locking
typing
post
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US560085A
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English (en)
Inventor
Gunter Kerzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympia Werke AG
Original Assignee
Olympia Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympia Werke AG filed Critical Olympia Werke AG
Application granted granted Critical
Publication of US3924724A publication Critical patent/US3924724A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/60—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies on spherical, truncated-spherical, or like surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S206/00—Special receptacle or package
    • Y10S206/804—Special receptacle or package with means to lift or draw out content

Definitions

  • ABSTRACT In order to facilitate the interchange of typing elements of the type having a cap at their top and arranged to be interchangeably installed on the element post of a typing machine, and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post, there is provided a member which defines a cover arranged to close the container in a hermetically sealed manner, and the cover is provided with a coupling unit which serves to connect the cover to the typing element cap while holding the locking device in its unlocking position, and a control member which can be actuated to disconnect the cover from the cap in order to permit the cover to be removed from the typing element, the locking device being enabled to move to its locking position upon removal of the
  • the present invention relates to an apparatus for replacing a capped typing element for typewriters or sim ilar office machines of the type in which the typing element is releasably fastened to the element post of the machine by means of a locking device disposed on its top surface, the typing element being stored prior to installation in a cup-shaped container having a hermetically sealed cover.
  • the typing element In printing mechanisms of typewriters and similar machines it is important that the typing element be easily exchangeable because there is often the necessity to frequently change over to foreign languages having different characters, to other types of script, or to special formula symbols. In such a change, the typing element should be easily removable from, and insertable into, its mount without there existing the danger of dropping the typing element or of soiling the fingers with printing ink.
  • Austrian Pat. No. 270,699 discloses a typing element with a lever handle which is pivotally mounted in a cap.
  • This lever handle acts via a cam surface disposed thereon on a wire spring which is also disposed in the cap and engages in a groove in the element post.
  • Complicated process steps are required to produce the lever handle of the known arrangement, and particularly to produce the cam surfaces.
  • These cam surfaces are also subject to increased wear because the free ends of the spring are in continuous frictional contact with the cam surfaces. Thus, these cam surfaces must be made of a hardenable material and this involves additional expenditures.
  • the known locking device further requires a certain dexterity on the part of the operator since pivoting of the lever handle is effected against the continuously increasing force of the wire spring and must thus be performed with care in order to prevent the thumb or a tinger from slipping off the lever handle. If this were to occur, the lever handle, which is under the force of the spring, would flip back into its starting position.
  • This known lever handle does prevent contact with the typing element surface during placement onto, and removal from, its mount, but not when the element must be taken out of its box.
  • the lever handle of the interchangeable typing element which has a dirty surface, is in the closed position.
  • it is necessary to tilt up the lever handle Since this is effected against the force of a spring, the typing element must be supported by placing the fingers against its surface. The danger of soiling the fingers with the printing ink thus remains.
  • the apparatus according to the present invention permits safe and easy exchanging of the typing element without contact with the surface bearing the type characters.
  • the removal and placement and the release and fastening of the typing element on its mount is effected by means of the already present cover of the storage container for the typing element. Thus no additional auxiliary means are required.
  • FIG. 1 is a cross-sectional view of a preferred embodiment of the invention.
  • FIG. 2 is a cross-sectional view of the typing element and the container cover of FIG. 1 in place on an element post.
  • FIG. 3 is a view similar to that of FIG. 2 showing the elements of FIG. 2 in a different state.
  • FIG. 4 is a plan view of the locking device of the preferred embodiment.
  • FIG. 1 shows a cup-shaped container 1 with a hermetic sealing locking cover 3 for a typing element, for example a spherical typing ball 5.
  • the element 5 may of course also have another shape, for example a cylindrical shape.
  • the spherical typing ball 5 is firmly and permanently connected with a cap 7 and is constructed to be form-fittingly and releasably connected, by means of a bearing sleeve 9 disposed in its upper portion, as shown in FIGS. 2 and 3, with an element post 11 of the setting drive of a typewriter.
  • the element 5 is locked in its position by means of a locking device which is disposed on its topside and below cap 7.
  • Post 11 and the structure for controlling its movements are already known in the art.
  • This locking device includes, for example as shown in FIG. 4, three spring-tensioned blocking slides 13, 15 and 17 which are angularly spaced from one another, and which are guided into corresponding transverse slits 19, 21 and 23 in the bearing sleeve 9 so as to engage, through the sleeve 9, in an annular groove 25 of element post 11.
  • the groove surface 26 of groove 25 which cooperates with blocking edges 29, 31 and 33 is given a conical shape.
  • the lower surface 41 of the bearing sleeve 9 is always pressed without play against a radial extension 43 of the element pull 1 1.
  • this mounting without play can also be realized by giving a conical configuration to the blocking edges 29, 31 and 33 of the blocking slides 13, 15 and 17, respectively.
  • cover 3 is provided with a detent coupling which is maintained under spring pressure and which can be connected with the cap 7 of typehead 5.
  • This detent coupling includes a plurality of, for example three, fingers 45 which are angularly offset by 120 from one another and which are disposed on the inside of cover 3. These fingers can be pushed into and through appropriately designed recesses 51 in cap 7 of the ball 5 and can be held fast to cap 7 by means of detent ridges 57 which are carried by resilient arms 63 integral with fingers 45 and which normally project into the region between cap 7 and sleeve 9.
  • the connection between the ball 5 and cover 3 can be controlled by a button 77 which is disposed in the center of cover 3.
  • This button 77 is mounted to be axially movable in a portion of cover 3 which is provided with a circular gripping edge 79.
  • the free ends 81 of fingers 45 in cover 3 are provided with tapered, conically rounded edges 87 which cooperate with the bent tongues 35, 37 and 39 of the blocking slides l3, l5 and 17, respectively, in order to bring the blocking slides 13, 15 and 17 into their unlocked position when the cover 3 and cap 7 are coupled together and into their locked position when the detent coupling between tongues 35, 37 and 39 and fingers 45 is released.
  • the coupling of element post 11 with typing element 5 is effected via a pin-slot connection.
  • the bearing sleeve 9 is provided with two slits 2 and 4, of respectively different widths, which can be coupled by means of a pin 6 held in post 11 and having ends 8 and of respectively different diameters adapted to the widths of the slits.
  • the respectively different diameters of ends 8 and 10 of pin 6 and the corresponding respectively different widths of slits 2 and 4 are necessary in order to assure that the typing element 5 will be installed in the proper direction.
  • the arrangement according to the present invention operates as follows:
  • button 77 is pressed downwardly in the direction of the arrow in FIG. 2 so that a convexly curved spring disc 69 is brought into approximately its flattened, or extended, position.
  • the resilient arms 63 with their detent ridges 57 are pressed outwardly so that the detent coupling is released.
  • cover 3 is again picked up and fingers 45 are placed into the corresponding recesses 51 in cap 7 of element 5.
  • the cover 3 is pressed downwardly until the free ends 81 of fingers 45 come to rest on the extension 43 of the element post 1 1.
  • the free ends 81 of fingers 45 press with their concial edges 87 onto the bent tongues 35, 37 and 39 of the blocking slides 13, 15
  • a typing element having a cap at its top and arranged to be interchangeably installed on the element post of a typing machine and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post; and a member defining a cover arranged to close the container in a hermetically sealed manner, wherein the improvement comprises: detent coupling means arranged to selectively connect said cover to said cap for permitting said typing element to be moved as a unit with said cover; spring means normally maintaining said detent coupling means in the position for creating such connection between said cover and said cap; and latch means carried by said cover for holding said locking means in said unlocking position when said cover is connected to said cap and for enabling said locking device to move to said locking position when said cover is separated from said cap.
  • said cap is provided with a plurality of openings
  • said latch means comprise a plurality of fingers projecting from that side of said cover which faces toward the interior of said container when closing said container, said fingers being arranged to engage through respective ones of said openings
  • said detent coupling means comprise a plurality of detent ridges each carried by a respective one of said fingers and extending laterally past the border of a respective opening to thus selectively connect said cover to said cap.
  • said spring means comprise a plurality of resilient arms each carried by a respective one of said fingers and each carrying a respective one of said detent ridges
  • said detent coupling means further comprise a convexly curved spring disc operatively associated with said resilient arms in a manner such that flattening of said disc moves said ridges in a direction to release the connection between said cover and said cap, and a push button located at the center of said cover and operatively associated with said disc in such a manner that pressure on said button serves to move said disc in the direction of flattening.
  • said locking device comprises a plurality of blocking slides presenting blocking edges arranged, when said typing element is installed on the element post of a typing machine, to be disposed concentrically to an annular locking groove provided on the element post and to engage in such locking groove to define the locking position of said device, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear such groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the locking position of said device when said cover is separated from said cap.
  • An arrangement as defined in claim 3 further comprising an element post on which said typing element is to be installed, said post having an annular locking groove presenting a conical configuration in the direction of movement of said locking device, and said locking device comprises a plurality of blocking slides presenting blocking edges disposed concentrically to said locking groove when said element is on said post and arranged to engage in said locking groove to define the locking position of said device, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear said locking groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the looking position of said device when said cover is separated from said cap.
  • said locking device further comprises a common spring ring connected to all of said blocking slides for urging them into the locking position of said device.

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US560085A 1974-03-23 1975-03-19 Structure for facilitating interchange of typing elements Expired - Lifetime US3924724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2414127A DE2414127A1 (de) 1974-03-23 1974-03-23 Einrichtung zum wechseln eines mit einer kappe versehenen typenkopfes fuer schreiboder aehnliche bueromaschinen

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US3924724A true US3924724A (en) 1975-12-09

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US560085A Expired - Lifetime US3924724A (en) 1974-03-23 1975-03-19 Structure for facilitating interchange of typing elements

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US (1) US3924724A (no)
JP (1) JPS50127721A (no)
CH (1) CH574328A5 (no)
DE (1) DE2414127A1 (no)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264221A (en) * 1978-12-11 1981-04-28 International Business Machines Corporation Print element cartridge
US4332490A (en) * 1979-07-03 1982-06-01 Hermes Precisa International S.A. Lining-up assembly for a printing disc
US4386862A (en) * 1978-11-21 1983-06-07 Olympia Werke Ag System for introducing function control instructions into a data writing office machine
US4586836A (en) * 1983-02-09 1986-05-06 Caracteres S.A. Characters carrying disc for printing machine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969864A (en) * 1959-08-24 1961-01-31 Ibm Attachment for print head
US3001628A (en) * 1960-10-27 1961-09-26 Ibm Printing mechanism
US3307677A (en) * 1965-10-06 1967-03-07 Ibm Arm positioned type head
US3576340A (en) * 1969-07-03 1971-04-27 Data Technology Corp Latch for disc pack protective cover
US3635608A (en) * 1969-03-26 1972-01-18 Ibm Magnetic disk assembly
US3753490A (en) * 1971-06-24 1973-08-21 Gen Instrument Corp Carry case for magnetic discs
US3800934A (en) * 1969-12-31 1974-04-02 Triumph Werke Nuernberg Ag Mounting means for single element type carrier
US3826345A (en) * 1973-01-26 1974-07-30 Scm Corp Print head mounting assembly

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969864A (en) * 1959-08-24 1961-01-31 Ibm Attachment for print head
US3001628A (en) * 1960-10-27 1961-09-26 Ibm Printing mechanism
US3307677A (en) * 1965-10-06 1967-03-07 Ibm Arm positioned type head
US3635608A (en) * 1969-03-26 1972-01-18 Ibm Magnetic disk assembly
US3576340A (en) * 1969-07-03 1971-04-27 Data Technology Corp Latch for disc pack protective cover
US3800934A (en) * 1969-12-31 1974-04-02 Triumph Werke Nuernberg Ag Mounting means for single element type carrier
US3753490A (en) * 1971-06-24 1973-08-21 Gen Instrument Corp Carry case for magnetic discs
US3826345A (en) * 1973-01-26 1974-07-30 Scm Corp Print head mounting assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386862A (en) * 1978-11-21 1983-06-07 Olympia Werke Ag System for introducing function control instructions into a data writing office machine
US4264221A (en) * 1978-12-11 1981-04-28 International Business Machines Corporation Print element cartridge
US4332490A (en) * 1979-07-03 1982-06-01 Hermes Precisa International S.A. Lining-up assembly for a printing disc
US4586836A (en) * 1983-02-09 1986-05-06 Caracteres S.A. Characters carrying disc for printing machine

Also Published As

Publication number Publication date
JPS50127721A (no) 1975-10-08
CH574328A5 (no) 1976-04-15
DE2414127A1 (de) 1975-10-02

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